qksms - The most beautiful SMS messenger app for Android

•    Java

QKSMS is an open source replacement to the stock messaging app on Android. It is currently available on the Google Play Store.We highly encourage contributions to QKSMS; we want to make it as easy and streamlined as possible. If you have any suggestions on how we can improve our workflow, please feel free to contact me.

Twidere-Android

•    Kotlin

wire-android - :phone: Wire for Android

•    Java

This repository is part of the source code of Wire. You can find more information at wire.com or by contacting opensource@wire.com.You can find the published source code at github.com/wireapp/wire.

AmazeFileManager - Material design file manager for Android

•    Java

Basic r/w operations might not work on external memory on Kitkat devices. Don't use cut/paste from or to external SD Card. You might lose your files.The device vendors/ROM developers are free to include Amaze apk pre-installed in system. There is no fee required, neither are any royality/credits elsewhere.

bitcoin-wallet - Bitcoin Wallet app for your Android device

•    Java

Bitcoin Wallet app for your Android device. Standalone Bitcoin node, no centralized backend required.

NewPipe - A lightweight Youtube frontend for Android

•    Java

NewPipe does not use any Google framework libraries, or the YouTube API. It only parses the website in order to gain the information it needs. Therefore this app can be used on devices without Google Services installed. Also, you don't need a YouTube account to use NewPipe, and it's FLOSS. Although NewPipe only supports YouTube at the moment, it's designed to support many more streaming services. The plan is, that NewPipe will get such support by the version 2.0.

UltimateAndroidReference - :rocket: Ultimate Android Reference - Your Road to Become a Better Android Developer

•    Java

The goal of this project is to provide a hand-picked collection of Android libraries, tools, open-source projects, books, blogs, tutorials - you name it. This project will try to showcase only the best, most popular and well-tested resources that you will actually need and find useful rather than overwhelming you with a plethora of low-quality ones.

android-foss - A list of Free and Open Source Software (FOSS) for Android – saving Freedom and Privacy

•    Shell

A list of Free and Open Source Software (FOSS) for Android – saving Freedom and Privacy.

riot-android - A glossy Matrix collaboration client for Android

•    Java

Riot is an Android Matrix client.This client is a standard android studio project.

vanilla - Vanilla Music Player for Android

•    Java

Vanilla Music player is a GPLv3 licensed MP3/OGG/FLAC/PCM player for Android.

K-9 Mail – Advanced Email for Android

•    Java

K-9 Mail is an open-source email client for Android.

Silence - SMS/MMS encryption made easy

•    Java

Silence (formerly SMSSecure) is an SMS/MMS application that allows you to protect your privacy while communicating with friends.Using Silence, you can send SMS messages and share media or attachments with complete privacy. It communicates using encrypted SMS messages. No servers or internet connection required. It uses the Signal encryption protocol to provide privacy for every message, every time.

andstatus - Low traffic social networking client with tree-like threaded conversations. For Android

•    Java

AndStatus is an Open Source low traffic social networking client with tree-like threaded conversations. It supports different Social networks, including GNU social (e.g. Quitter.se, LoadAverage, etc.), Twitter, Mastodon and Pump.io. AndStatus can combine your feeds from all networks into one Timeline, and it allows you to read and post even when you are offline.For Android OS version 4.1 or higher. Under Free/Libre and Open Source License.

dandelion - dandelion* - a diaspora* android client

•    Java

This is an unofficial webview based client for the community-run, distributed social network diaspora*. It's currently under development and should be used with that in mind. Please submit any bugs you might find.The app is developed as a WebApp because currently diaspora* doesn't have an functional API that can be used to create a native interface to retrieve the user's data, publications, direct messages and so on. That's why there are currently only WebApps for diaspora* out there. Stay tuned on diaspora* issues about API.

oandbackup - backup manager for android

•    Java

a backup program for android. requires root and allows you to backup individual apps and their data. both backup and restore of individual programs one at a time and batch backup and restore of multiple programs are supported (with silent / unattended restores). restoring system apps should be possible without requiring a reboot afterwards. oandbackup is also able to uninstall system apps. handling system apps in this way depends on whether /system/ can be remounted as writeable though, so this will probably not work for all devices (e.g. htc devices with the security flag on). backups can be scheduled with no limit on the number of individual schedules and there is the possibility of creating custom lists from the list of installed apps.copy the busybox binary to your system, for example /system/xbin or /data/local, and make it executable. symlinking is not necessary for use with oandbackup. in the oandbackup preferences, provide the whole path to the busybox binary, including the binary's file name (e.g. /data/local/busybox).

Simple-File-Manager - A simple file manager for browsing and editing files and directories.

•    Kotlin

A simple file manager for browsing and editing files and directories.Can also be used for browsing root files and SDcard content. You can easily copy, move, delete and share anything you wish.

MyExpenses - GPL licenced Android Expense Tracking App

•    Java

GPL licenced Android Expense Tracking App.My Expenses is an Android app designed to keep track of your expenses and incomes, and to export them as QIF files into a desktop finance tool, like Grisbi (Open Source), Gnucash (Open Source), MS Money, Quicken or Wiso Mein Geld. Requires Android 2.3 and above.

android-dev - :zap: Curated list of resources for Android app development. Prepare for battle!

Developing great Android apps is hard, as anyone who has ever tried to make one can attest. So it helps to turn up fully-equipped for battle. To that end, here's a curated list of indispensable resources.

AndroidApp - Emoncms Android app

•    Java

View MyElectric Emoncms dashboards from http://emoncms.org or any other Emoncms server. Emoncms is an open-source web application for processing, logging and visualising energy, temperature and other environmental data and is part of the OpenEnergyMonitor project.

3DSView - Android UI component to process banking 3D Secure (MasterCard SecureCode / Verified By Visa) payment authorizations in Android apps

•    Java

Self-contained UI component to process banking 3D Secure (MasterCard SecureCode / Verified By Visa) payment authorizations in Android apps. Component have to be used instead of a WebView and handles the complete payment authorization process from redirecting user to an ACS banking server web UI and to grabbing authorization results and parameters, intercepting post events and parsing the code.